Evolution Or Natural Selection?

Mackerel has a strange eye-like design in their back. As long as they remain just design, they are just the result of natural selection. If those eye-like pattern back of mackerel turn to real eyes, that is evolution.

No, not really

[Apocalypse111]

You seem to be trying to make a distinction where there is none. Natural selection is one of the many mechanisms by which a population evolves. The mackerel species has evolved into its current state (with the eye-like pattern) due to natural (and other forms of) selection. If mackerels somehow eventually changed such that they had real eyes on their backs, it would be because those eyes conferred some kind of advantage, and thus evolution would again be occurring due to some form of selection.

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[bettiwettiwoo]

Well said.

I would just like to emphasise that there is not reason why a pattern, on the backs on mackerels or elsewhere, irrespective of whether it looks like eyes to us or not, would develop into actual eyes. (The pattern and the actual eyes wouldn't necessarily confer the same advantage(s) either.)

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[mercedo]

Thank you very much for correcting my journal. I was not sure whether I was right, now I know I had confused. Have you ever heard about eight-eyed eel? Here is the link [hokkaido.jp].